Valve with yieldable face



Nov. 17, 1953 v J. RAND 2,659,567

VALVE WITH YIELDABLE FACE.

Filed Feb. 12, 1949 an M6 llIiE INVENTOR.

HENRY J. RAND BY 7% M 7 ATTORNEYS Patented Nov. 17, 1953 UNITED STATESQFFI QE VALVE WlTH YIELDA'BLIE CEACEF Henry J. Band, Bratenahl, Ohio,assignor. to

Magic Seal,,Inc. .Bratenahl, .Ohio, at corporation of Ohio ApplicationEebrnary 12, 1949, :Serial :No; .76;0!71- 4 Claims. E

present invention, provides a plug generally of resilient. rubberlikematerial having a core--of harder rubberlikematerial formed. integrallytherewith so asto stiffen thebody-ofthe plug,

prevent singing :andrchattering of the valve; and

to .otherwise :support the? plug on the-valve; stem. Other objectsandadvantages'of the presentinvention willhe shownmthecaccompanyingdrawingsand the essentialjeatures" Willa-be set :forthin the appended claims.

In the drawings,

Fig. 1 is; an central-sectional :View" through a :faucetiequipped withmyinvention;

Fig. 2 ;is;an 'enlazrged'fragmenta'l sectional view of certain .partspfFig; 1, .but: showing the valve movedintoclosedtposition;

Figs; 3' andare enlargedsectional views taken alongsimilarly'numberedlines ofFig; 1; while Fig. 5 .is a view similar to certainportions-ofFig. 1 showing the valve "plug "in :side elevational view; asheinginserted into thevalvebore from theztop.

While "my-invention is applicable to many types of rvalves, I ,havechosen 1 to i1lustrate-the=same as; utilized in a swell Lknown type offaucet; This should besheldinno way-a limitation of my-invention, as Iintend to use myimprovement in;

many .types of valves.

My invention is shown as applied to a valve ofthegeneral*type-disclosed"and claimed in my copending"applicationgserial'."No; 71,092, filed January 15, 1949, to whichreference may Ice-had for, a more .complete description. It will suificeto say here that the valve housing In is provided withgan inlet H and anoutlet. l2 and-between them, -,a valve bore 13. A- resilient plug 14-?is ifirmlyheldon a stem portion |5-which:is:mountr ed'to. move axiallywith but .to rotate relatively to the ,main stem l6. To this-end, theiuppersend of,'stem portion l5 enters a recess inithe' lower end of. themain stem [6 and::is:;held:rotatably therein by means of a U-shaped pinI! which slides into the-milled slots l8 of the stem l6 and; engages inthe annular groove l9 ofthe stem portion J 5.

The main stem l6 has a threaded engagement at 20 with the upper end ofthe valve body. A

handle- 21 is rigidly. attachedhtothenppenezid .of .stem .portion .I 6;so as :to rotate the same'which causes the threaded engagement betweenthe stemtandhousingto move the sealin plug-:14 upwardly and downwardlyrfl he'upper .endof thestem is packedrin the usual manner .byrmeans ofthe packing 22 held in :position ibythe packing nut-23;Downwardmovementof the-.valvestem islimited .bytengagement-of the bossZlaomthe handle with the: packing shut-.23. Upwardzmovementof the valveplugeisalimited-lbyengagement of the threaded portion of steml-G-against the bottom sid'ezof the .packingi2 2.

I have foundthatta cheaplandzsimple-away-to providea satisfactory;ph g;vfor use. in this-.ltyile :of -valve consists: in imaking a portion LlllaQfuhard rubberlike 2- material and a portion 1 dbaofrsofter and moreresilient,rubberlikeematerial; :Qnemf the; advantages-lei this-type:ofvalve; especially tin-1a faucet,issthat-itamaybe assembled'by moving theplugl 4=.downwardlythrough the-bore l3 Whenassembl-ing thevalve.'IT'his-positionpf the parts is-iillustrated Fig; .5. The-upper. endofthe boreis- 'flareduas indicatedzat -.l3.a:so .aswto facilitate theentrance of the -;plug.:|4- into xthe here. The plug; I4ydoes;=not-zdifier-=greatly -inrdiameter :from the-boreJS set-forthinmy abovementionedlcopendingrapplication.

Preferably; however; the uppermost: diameter of the plu hldl isslightlyless:- than the: diameter or"- lbore 3,,and the: lowermostdiametenoi'the plug; d d": is: slightly-greater; than ;-thediameter :ofthe bore 13; It-tis:thusnecessaryfor themuter most portion of plug M tobe; cammed inwardly has the-. partsr move down shown in; Fig. through;the bore: l 3 to. operative -;position .as

shown iniEig.,-.. 1. To ithis end; the plug 1411111151 :have-sumcienhresilience to permit this-operatiom- Furthermore; the :resilience @ofthe plug :aidsjnwthe good sealing:gactionwhich will-be-pres--entlmdescrihediin:connection withiFig. 2.:

Tmachieveethese;desirablecresults; I have X3011- ceived" that net:rleasti the outermost::portions.::of

theiplug. di nearsthe wallsaof the bore -|3:-:must

Qbe .ofgresilient .rubberlike: material, sufiiciently :sottf. that: the1: plug. :willbe: cammed inwardlyxby the flaring chore. portion. I 311'.when. the. valvesris heingasassemhled. Also, ifv therplug is'..:-ormedwith :a .idownwardly extendin zzaperipheral"flange illiccatrthe'ibottom,:as: taught :bymyaboves-mentionedicopendi ngapplication; thentaeresiliency in this portion of the valve aidsin the =-seaiing action;Aimost -any portion of the'plug inwardly from this zone and upwardlyfrom the zone I 40 may be made of the harder rubberlike material 3 Ilawhich forms a backingdisc. I have shown what I regard as the minimumextent of this more rigid rubberlike material in Figs. 1 and 2. Here theharder more strongly vulcanized rubberlike material Ma is of annulardisk form surrounding the screw 24 which holds the plug I4 on the stemportion l5. For clearness in drawing, I have shown the portions 14a andNb as rather definitely limited in area. Actually, I form the plug byvulcanizing these two parts together so that there is no real line ofdemarca-' tion between the stiffer portions Ma and the more resilientportions I 4b.

It is desirable that the stiff portion Ma extend almost to the peripheryof the uppermost wall of the plug Hi. This is to stiffen this' portionof the plug which engages in sealing contact with the shoulder I312 onthe valve housing where the flared portion of the bore I30 joins themain portion of the bore l3. At this point, there is a line contactbetween the parts. At this point also there is danger of singing andchattering of the valve as it approaches or leaves closed position. Toprevent this, the uppermost portion of the plug I4 must be held quiterigid almost out to its outermost periphery. The hard rubber portion Maprovides this type of support.

The harder rubberlike portion Ma might extend through the centralportion of the plug downwardly to engage the metal washer 25 which i isheld between the head of screw 24 and the main body of the plug. If thisis not done, however, I utilize a spacer sleeve 26 which extends fromthe metal washer 25 upwardly along the screw 24 to engage against theharder rubberlike portion Ma as clearly shown in Figs. 1 and 2, Thevertical height or thickness of the rubberlike portion 14a and thesleeve 26 is such as to limit the pressure exerted by the screw 24 asthe plug I4 is pulled up tightly against the stem portion [5. Thispressure is sufficient to hold 'the plug firmly on the flat lowermostface of stem portion but is insufficient to cause the outermost walls ofplug 14 to bulge outwardly.

What I claim is:

1. In a valve of the type wherein a housing is provided having a fluidinlet and a fluid outlet and having a cylindrical bore intermediate saidinlet and outlet and communicating with both of them, and wherein aresilient sealing plug of frusto-conical form is adapted to pass throughsaid bore and is movable into and out of the upstream end of saidpassage to seal said bore, said plug having a smaller diameter basedownstream and of less diameter than the diameter of the bore and havingits base of larger diameter not substantially greater than the diameterof said bore,'the combination therewith of a sealing plug having abacking disc of hard rubber-like material and an outer cushion of softrubber-like material bonded to said disc, said disc extendingsubstantially to the periphery of said smaller diameter base andproviding sufficient rigidity there to prevent said valve fromchattering as said plug is moved into and out of the upstream end'ofsaid bore, and said outer cushion of soft rubber-like material radiallyoutside of said disc engaging the walls of said bore to seal the samewith an initial line contact, there being sufficient of said outercushion of soft rubber-like material, radially outside of said disc, topermit said plug ,to pass through said bore.

ameter slightly less than the diameter of said bore, said plug having abacking disc of hard rubber-like material and an outer cushion of softrubber-like material bonded to said disc, said disc being adjacent saidsmaller diameter base of said plug and extending substantially over theentire area of said face, and said outer cushion of soft rubber-likematerial radially outside of said disc engaging the walls of said boreto seal the same with an initial line contact, there being sufficient ofsaid outer cushion of soft rubber-like material, radially outside ofsaid disc, to permit said plug to pass through said bore.

3. The combination of claim 2 including means engaging the upstream endof said plug and securing said plug to said stem, and rigid spacer meansengaging between said securing means and said disc, whereby the pressureexerted by said securing means is transmitted by said spacer means overthe entire area of said disc so as to hold said plug firmly to saidface.

4. A valve for cooperation with a substantially cylindrical valve boreof predetermined diameter and comprising a stem, a resilient sealingplug secured to said stem, said plug having a generally frusto-conicalform with its smaller diameter base downstream and of less diameter thanthe diameter of the bore and with a base of larger diameter notsubstantially greater than the diameter of said bore, said stem having aface at its upstream end and in a plane at right angles to the axis ofsaid stem, said face having a diameter slightly less than the diameterof said bore, said plug having an outer cushion of resilient materialand a backing disc of less resilient material bonded to said cushion,said disc being adjacent said smaller diameter base of said plug andextending substantially over the entire area of said face, and said'outer cushion of resilient material radially outside of said discengaging the walls of said bore to seal the same with an initial linecontact, there being sufficient of said outer cushion of resilientmaterial, radially .outside of said disc, to permit said plug to passthrough said bore.

HENRY J. RAND.

References Cited in the file of this patent UNITED STATES PATENTS NumberName Date 588,765 Draullette Aug. 24, 189.7 591,072 Bourne Oct. 5, 18972,132,894 Esnard Oct. 11, 1938 2,148,850 Deakins Feb. 28., 19392,209,709 Weatherhead July 30, 1940 2,240,129 Broecker Apr. 29, 19412,299,068 Gora Oct. 20, 1942 2,311,748 Gora Feb. 23, 1943 2,473,591Killner June 21, 1949 FOREIGN PATENTS Number Country Date 2,710 GreatBritain of 1890

